diff --git a/ble-decode.sh b/ble-decode.sh
index 304be8ba..cf3ecedd 100644
--- a/ble-decode.sh
+++ b/ble-decode.sh
@@ -395,19 +395,23 @@ function ble-decode-char/csi/.modify-kcode {
 function ble-decode-char/csi/.decode {
   local char=$1 rex kcode
   if ((char==126)); then
-    if rex='^27;([1-9][0-9]*);?([1-9][0-9]*)$' && [[ $_ble_decode_csi_args =~ $rex ]]; then
+    if rex='^>?27;([0-9]+);?([0-9]+)$' && [[ $_ble_decode_csi_args =~ $rex ]]; then
       # xterm "CSI 2 7 ; <mod> ; <char> ~" sequences
-      local kcode=$((BASH_REMATCH[2]&ble_decode_MaskChar))
-      ble-decode-char/csi/.modify-kcode "${BASH_REMATCH[1]}"
+      local param1=$((10#${BASH_REMATCH[1]}))
+      local param2=$((10#${BASH_REMATCH[2]}))
+      local kcode=$((param2&ble_decode_MaskChar))
+      ble-decode-char/csi/.modify-kcode "$param1"
       csistat=$kcode
       return
     fi
 
     if rex='^([1-9][0-9]*)(;([1-9][0-9]*))?$' && [[ $_ble_decode_csi_args =~ $rex ]]; then
       # "CSI <kcode> ; <mod> ~" sequences
-      kcode=${_ble_decode_csimap_tilde[BASH_REMATCH[1]]}
+      local param1=$((10#${BASH_REMATCH[1]}))
+      local param3=$((10#${BASH_REMATCH[3]}))
+      kcode=${_ble_decode_csimap_tilde[param1]}
       if [[ $kcode ]]; then
-        ble-decode-char/csi/.modify-kcode "${BASH_REMATCH[3]}"
+        ble-decode-char/csi/.modify-kcode "$param3"
         csistat=$kcode
         return
       fi
@@ -415,11 +419,13 @@ function ble-decode-char/csi/.decode {
   elif ((char==94||char==64)); then
     if rex='^[1-9][0-9]*$' && [[ $_ble_decode_csi_args =~ $rex ]]; then
       # rxvt "CSI <kcode> ^", "CSI <kcode> @" sequences
-      kcode=${_ble_decode_csimap_tilde[BASH_REMATCH[1]]}
+      local param1=$((10#${BASH_REMATCH[1]}))
+      local param3=$((10#${BASH_REMATCH[3]}))
+      kcode=${_ble_decode_csimap_tilde[param1]}
       if [[ $kcode ]]; then
         ((kcode|=ble_decode_Ctrl,
           char==64&&(kcode|=ble_decode_Shft)))
-        ble-decode-char/csi/.modify-kcode "${BASH_REMATCH[3]}"
+        ble-decode-char/csi/.modify-kcode "$param3"
         csistat=$kcode
         return
       fi
@@ -430,7 +436,8 @@ function ble-decode-char/csi/.decode {
   kcode=${_ble_decode_csimap_alpha[char]}
   if [[ $kcode ]]; then
     if rex='^(1?|1;([1-9][0-9]*))$' && [[ $_ble_decode_csi_args =~ $rex ]]; then
-      ble-decode-char/csi/.modify-kcode "${BASH_REMATCH[2]}"
+      local param2=$((10#${BASH_REMATCH[2]}))
+      ble-decode-char/csi/.modify-kcode "$param2"
       csistat=$kcode
       return
     fi
diff --git a/ble-edit.sh b/ble-edit.sh
index 5c8cb800..6ff5ff01 100644
--- a/ble-edit.sh
+++ b/ble-edit.sh
@@ -555,10 +555,10 @@ function ble-edit/draw/trace/SGR/arg_next {
   fi
 
   if ((j<${#f[*]})); then
-    _ret=${f[j++]}
+    ((_ret=10#0${f[j++]}))
   else
     ((i++))
-    _ret=${specs[i]%%:*}
+    ((_ret=10#0${specs[i]%%:*}))
   fi
 
   (($_var=_ret))
@@ -575,68 +575,69 @@ function ble-edit/draw/trace/SGR {
   for ((i=0,iN=${#specs[@]};i<iN;i++)); do
     local spec=${specs[i]} f
     ble/string#split f : "$spec"
-    if ((30<=f[0]&&f[0]<50)); then
+    local arg=$((10#0${f[0]}))
+    if ((30<=arg&&arg<50)); then
       # colors
-      if ((30<=f[0]&&f[0]<38)); then
-        local color=$((f[0]-30))
+      if ((30<=arg&&arg<38)); then
+        local color=$((arg-30))
         ((g=g&~_ble_color_gflags_MaskFg|_ble_color_gflags_ForeColor|color<<8))
-      elif ((40<=f[0]&&f[0]<48)); then
-        local color=$((f[0]-40))
+      elif ((40<=arg&&arg<48)); then
+        local color=$((arg-40))
         ((g=g&~_ble_color_gflags_MaskBg|_ble_color_gflags_BackColor|color<<16))
-      elif ((f[0]==38)); then
+      elif ((arg==38)); then
         local j=1 color cspace
         ble-edit/draw/trace/SGR/arg_next -v cspace
         if ((cspace==5)); then
           ble-edit/draw/trace/SGR/arg_next -v color
           ((g=g&~_ble_color_gflags_MaskFg|_ble_color_gflags_ForeColor|color<<8))
         fi
-      elif ((f[0]==48)); then
+      elif ((arg==48)); then
         local j=1 color cspace
         ble-edit/draw/trace/SGR/arg_next -v cspace
         if ((cspace==5)); then
           ble-edit/draw/trace/SGR/arg_next -v color
           ((g=g&~_ble_color_gflags_MaskBg|_ble_color_gflags_BackColor|color<<16))
         fi
-      elif ((f[0]==39)); then
+      elif ((arg==39)); then
         ((g&=~(_ble_color_gflags_MaskFg|_ble_color_gflags_ForeColor)))
-      elif ((f[0]==49)); then
+      elif ((arg==49)); then
         ((g&=~(_ble_color_gflags_MaskBg|_ble_color_gflags_BackColor)))
       fi
-    elif ((90<=f[0]&&f[0]<98)); then
-      local color=$((f[0]-90+8))
+    elif ((90<=arg&&arg<98)); then
+      local color=$((arg-90+8))
       ((g=g&~_ble_color_gflags_MaskFg|_ble_color_gflags_ForeColor|color<<8))
-    elif ((100<=f[0]&&f[0]<108)); then
-      local color=$((f[0]-100+8))
+    elif ((100<=arg&&arg<108)); then
+      local color=$((arg-100+8))
       ((g=g&~_ble_color_gflags_MaskBg|_ble_color_gflags_BackColor|color<<16))
-    elif ((f[0]==0)); then
+    elif ((arg==0)); then
       g=0
-    elif ((f[0]==1)); then
+    elif ((arg==1)); then
       ((g|=_ble_color_gflags_Bold))
-    elif ((f[0]==22)); then
+    elif ((arg==22)); then
       ((g&=~_ble_color_gflags_Bold))
-    elif ((f[0]==4)); then
+    elif ((arg==4)); then
       ((g|=_ble_color_gflags_Underline))
-    elif ((f[0]==24)); then
+    elif ((arg==24)); then
       ((g&=~_ble_color_gflags_Underline))
-    elif ((f[0]==7)); then
+    elif ((arg==7)); then
       ((g|=_ble_color_gflags_Revert))
-    elif ((f[0]==27)); then
+    elif ((arg==27)); then
       ((g&=~_ble_color_gflags_Revert))
-    elif ((f[0]==3)); then
+    elif ((arg==3)); then
       ((g|=_ble_color_gflags_Italic))
-    elif ((f[0]==23)); then
+    elif ((arg==23)); then
       ((g&=~_ble_color_gflags_Italic))
-    elif ((f[0]==5)); then
+    elif ((arg==5)); then
       ((g|=_ble_color_gflags_Blink))
-    elif ((f[0]==25)); then
+    elif ((arg==25)); then
       ((g&=~_ble_color_gflags_Blink))
-    elif ((f[0]==8)); then
+    elif ((arg==8)); then
       ((g|=_ble_color_gflags_Invisible))
-    elif ((f[0]==28)); then
+    elif ((arg==28)); then
       ((g&=~_ble_color_gflags_Invisible))
-    elif ((f[0]==9)); then
+    elif ((arg==9)); then
       ((g|=_ble_color_gflags_Strike))
-    elif ((f[0]==29)); then
+    elif ((arg==29)); then
       ((g&=~_ble_color_gflags_Strike))
     fi
   done
@@ -655,7 +656,7 @@ function ble-edit/draw/trace/process-csi-sequence {
       return ;;
     ([ABCDEFGIZ\`ade])
       local arg=0
-      [[ $param =~ ^[0-9]+$ ]] && arg=$param
+      [[ $param =~ ^[0-9]+$ ]] && ((arg=10#$param))
       ((arg==0&&(arg=1)))
 
       local x0=$x y0=$y
@@ -722,6 +723,7 @@ function ble-edit/draw/trace/process-csi-sequence {
       # HVP "CSI f"
       local -a params
       ble/string#split-words params "${param//[^0-9]/ }"
+      params=("${params[@]/#/10#}")
       ((x=params[1]-1))
       ((y=params[0]-1))
       ((x<0&&(x=0),x>=cols&&(x=cols-1),